By Dag Pike
This is a booklet approximately functional navigation—packed with functional how one can make navigation more secure, more uncomplicated and higher. it's a ebook for anyone—whether riding an influence boat or crusing a yacht. And the concepts conceal either digital in addition to visible navigation.
This booklet begins the place others end. upon getting the $64000 fundamentals of navigation, you have to see tips to translate those into useful navigation suggestions to exploit whilst making plans sooner than going to sea and as soon as you are out there.
50 how one can enhance Your Navigation distils Dag Pike's adventure won from over 50 years of navigating a complete variety of craft from excessive velocity energy boats and lifeboats to ships and crusing boats. Written via the most skilled navigators on the planet, it's your passport to functional navigation thoughts that might get you effectively in your vacation spot no matter if in advantageous climate or foul.
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Extra info for 50 Ways to Improve Your Navigation
If the sounder shows a certain depth then you cannot be in deeper or shallower water (as long as you make allowance for the rise and fall of the tide, if this is significant). Always allow a degree of latitude when using soundings in this way because you are unlikely to get pinpoint accuracy and the chart sounding may not reflect what is actually there. Consider the soundings as a guide rather than an absolute fix. When you get within sight of land and are lucky enough to get a transit bearing, you know very precisely that your position must lie somewhere along that line.
The main time that a boat is at risk of grounding is when making a landfall or entering harbour, and this is where depth measurements can be a very important indicator. Even when the GPS shows the position to be safe, an adequate depth of water showing under the keel on the sounder is the important confirmation that you need. When navigating, an independent check is always important and this is one of the most useful roles of the sounder. In order to use the sounder readings in a meaningful way you need to study the chart carefully, not only at the expected landfall point but also for a distance to either side of it.
Today it’s rare to fix your position with bearings but the conspicuous marks along the coast can still be valuable, because they provide strong clues about where you are. As we saw in 12: Transit bearings, a conspicuous mark is only really valuable when it is also marked on the chart. Marks may be identified by being annotated ‘Spire conspic’ or ‘tall building conspic’. That was fine when the survey from which the chart was generated was up-to-date but today many of these so-called conspicuous objects can be either difficult to see or may be confusing.